Early revisions (Rev 1.1) of the Raspberry Pi 4 schematic revealed a famous design oversight: both and CC2 (Configuration Channel) pins on the USB-C port were tied together to a single 5.1kΩ pull-down resistor.
First, a clarification. When you search for Pi schematics, you might find two types of documents:
Power rail for the high-speed LPDDR4 RAM. Raspberry Pi 4 Model B Full Schematic
The Raspberry Pi 4 Model B is a remarkable piece of engineering, and the available documentation—imperfect though it may be—provides enough transparency to enable a vast ecosystem of hardware innovation. Whether you are a seasoned embedded engineer or a curious maker, the schematic is your first step toward truly understanding what makes the Pi 4 tick.
: Provides physical specifications and mechanical dimensions in millimeters. Early revisions (Rev 1
This lane runs straight from the BCM2711 to a .
The Raspberry Pi 4 requires a stable 5V, 3A power source. The power subsystem on the schematic handles conversion, sequencing, and protection. The Raspberry Pi 4 Model B is a
: Dedicated pins for using a Power over Ethernet HAT.
At the core of the Raspberry Pi 4 Model B is the . Unlike its predecessors, which relied on older ARM architectures, the BCM2711 incorporates a quad-core ARM Cortex-A72 processor running at 1.5 GHz (or up to 1.8 GHz in later firmware revisions). Key Architectural Shifts in the Schematic